Gut:高甘油三酯血症性胰腺炎病理生理新现象

2018-04-13 路国涛、杨娜 南京大学医学院

近日Gut杂志发表了南京大学医学院李维勤教授团队题为Hypertriglyceridemia delays pancreatic regeneration after acute pancreatitis in mice and patients的研究,揭示了HTG可延缓AP修复过程,并验证了早期强化降脂治疗改善高甘油三酯血症性胰腺炎(hypertriglyceridemic acute panc

近日Gut杂志发表了南京大学医学院李维勤教授团队题为Hypertriglyceridemia delays pancreatic regeneration after acute pancreatitis in mice and patients的研究,揭示了HTG可延缓AP修复过程,并验证了早期强化降脂治疗改善高甘油三酯血症性胰腺炎(hypertriglyceridemic acute pancreatitis,HTG-AP)修复的作用。

急性胰腺炎(acute pancreatitis, AP)是内科常见急腹症之一,是一种由胆石、高甘油三酯等因素导致的急性胰腺外分泌系统炎症损伤,胰腺须经过一系列修复过程才能恢复至正常的功能和形态。修复过程受损不仅可导致胰腺外分泌功能不全,严重影响患者生活质量,而且增加了慢性胰腺炎发病的风险,一些药物如吗啡或者代谢性疾病如糖尿病可延缓上述修复过程。高甘油三酯血症(hypertriglyceridemia, HTG)是一种常见的代谢性疾病,目前是我国AP的第二大病因。临床及基础研究均发现HTG可加重AP严重度,患者预后与血清甘油三酯水平呈负相关。但HTG是否影响AP后胰腺修复尚不明确。

为明确HTG对急性胰腺炎修复的作用,该团队对重症胰腺炎中心73名患者长达1年的随访,使用粪弹力蛋白酶评估了患者出院1年后的胰腺外分泌功能恢复的情况。结果发现患者甘油三酯水平与粪弹力蛋白酶水平呈负相关。进而,该团队利用两种HTG动物模型:泊洛沙姆(poloxamer 407, P407)诱导的HTG小鼠和糖基磷脂酰肌醇高密度脂蛋白结合蛋白1(glycosylphosphatidylinositol anchored high density lipoprotein binding protein 1,GPIHBP1)基因缺陷小鼠,腹腔注射雨蛙素建立AP动物模型。结果显示,相比于正常甘油三酯小鼠,HTG小鼠胰腺修复显着延迟,且血清甘油三酯水平越高修复越慢。考虑与AP修复相关的纤维炎性反应以及腺泡细胞增生等有关。


图1 HTG抑制雨蛙素诱导的AP的修复。

为明确降脂治疗能否改善HTG-AP修复的进程,该团队采用临床最常用的降甘油三酯药物——非诺贝特,于AP造模后处理正常甘油三酯小鼠及HTG小鼠。结果发现,相比于HTG-AP组,非诺贝特处理组中300mg/kg/d剂量组造模后第3天甘油三酯水平显着降低、腺泡细胞增生加强,第5天胰腺组织坏死面积显着下降。正常甘油三酯小鼠使用了非诺贝特干预后其AP修复过程无明显变化。这提示非诺贝特促进HTG-AP小鼠胰腺修复依赖于甘油三酯的下降,而非药物的本身作用。


图2非诺贝特促进HTG-AP小鼠胰腺组织的修复。

该研究首次揭示了HTG对于AP修复的影响,完善了对HTG-AP的病理生理学过程的认知。临床上关于HTG-AP发病后是否需要降脂治疗争议不断,且临床治疗中多忽视急性胰腺炎患者恢复期的甘油三酯水平,本项研究使用非诺贝特进行强化降脂治疗改善AP修复的现象,为HTG-AP的治疗提供了新思路。

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    2018-04-14 张新亮1853311252142e2fm

    好文献.学习了

    0

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    2018-04-14 changjiu

    学习一下谢谢

    0